EXTRACT NUMBER FROM A COMBINED STRING AND NUMBERS

I have for example the following string 'mario5.png' or 'Julian15.png' and want to extract the numbers from there in the first case 5 in the second case 15. Can anyone tell me which function to look for?

Answer 1

[Dishant Arora]

String = 'mario5.png';
output = String(regexp(String , '[0-9]'));

[Diego]

but what if the nomber is bigger than 10 will this work?

Answer 2

[David Sanchez]

use str2double to get it in double format:

output = str2double(String(regexp(String , '[0-9]')))
output =

       5

otherwise your output will be a string.

Answer 3

[Brian B]

If the number is bigger than 9, you can make a slight modification to the answer by David Sanchez:

    output = str2double(String(regexp(String , '[0-9]+')))

This will work for positive integers. The "+" means "one or more". You can also skip a step by requesting that regexp return the matching part of the string instead of the index of the match:

output = str2double(regexp(String , '[0-9]+', 'match'))

[Diego]

Thank you so much to all of you!